Natures wonders: kangaroos are lefft handed (Introduction)

by David Turell @, Friday, June 19, 2015, 15:31 (1704 days ago) @ David Turell

Generally true, and raises the question of why are primates mostly right handed. Handedness must have some origin in evolution, but as a southpaw I can tell you that the inheritance of handedness, if any, in humans is unknown and seemingly not present.

"Kangaroos prefer to use one of their hands over the other for everyday tasks in much the same way that humans do, with one notable difference: generally speaking, kangaroos are lefties. The finding, reported in the Cell Press journal Current Biology on June 18--the first to consider handedness in wild kangaroos--challenges the notion that "true" handedness among mammals is a feature unique to primates.

"'According to a special-assessment scale of handedness adopted for primates, kangaroos pulled down the highest grades," says Yegor Malashichev of Saint Petersburg State University in Russia. "We observed a remarkable consistency in responses across bipedal species in that they all prefer to use the left, not the right, hand.'"

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